A transition metal‐free approach for the N‐arylation of amino acid derivatives has been developed. Key to this method is the use of unsymmetricdiaryliodoniumsalts with anisyl ligands, which proved important to obtain high chemoselectivity and yields. The scope includes the transfer of both electron deficient, electron rich and sterically hindered aryl groups with a variety of different functional
Synthesis of 2,3-Diarylisoindolin-1-one by Copper-Catalyzed Cascade Annulation of 2-Formylbenzonitriles, Arenes, and Diaryliodonium Salts
作者:Li Liu、Shu-Hua Bai、Yang Li、Li-Xun Wang、Yang Hu、Hui-Ling Sung、Jian Li
DOI:10.1021/acs.joc.7b02035
日期:2017.10.20
A three-component cascade cyclization was developed to synthesize 2,3-diarylisoindolin-1-one by using 2-formylbenzonitrile, arenes, and diaryliodonium salts. The process underwent copper-catalyzed tandem C–N/C–C bond formation, producing isoindolin-1-one derivatives in good to excellent yields.
Selective Synthesis of <i>ortho-</i>Substituted Diarylsulfones by Using NHC-Au Catalysts under Mild Conditions
作者:Haibo Zhu、Yajing Shen、Daheng Wen、Zhang-Gao Le、Tao Tu
DOI:10.1021/acs.orglett.8b03957
日期:2019.2.15
A single-step gold(I)-catalyzed chemoselective protocol to access ortho-substituted diarylsulfones has been established. Acenaphthoimidazolylidene gold complexes are effective catalysts for the arylsulfonylation of boronic acids by potassium metabisulfite (K2S2O5) and diaryliodonium salts to access (poly-)ortho-substituted diarylsulfones even in gram scale. Unlike the transition metal-catalyzed two-component
已经建立了一步金(I)催化的化学选择方案以访问邻位取代的二芳基砜。ena啶咪唑基亚金络合物是焦亚硫酸氢钾(K 2 S 2 O 5)和二芳基碘鎓盐对硼酸进行芳基磺酰化的有效催化剂,即使以克为单位,也可得到(多)邻位取代的二芳基砜。与过渡金属催化的双组分偶联系统不同,二芳基碘鎓盐中的位阻芳基优先转移到体积较小的芳基上,以形成合成困难的靶标,包括具有药学重要性的靶标。
Metal-Free Synthesis of <i>ortho</i>-CHO Diaryl Ethers by a Three-Component Sequential Coupling
A practical, metal-free, and highly chemoselective approach was developed for the synthesis of ortho-CHO diaryl ethers by a three-component sequential coupling of arynes, N,N-dimethylformamide (DMF), and diaryliodoniumsalts. Diverse functional groups including halo, nitryl, and bulky substituents and heteroaromatics are well tolerated. Mechanistically, isotopic tracer experiments reveal that the diaryliodonium
A new method for the formation of 1,1‐difluoroethyl copper species (“CuCF2CH3”) with 1,1‐difluoroethylsilane (TMSCF2CH3) has been developed. The “CuCF2CH3” species can be applied to the efficient 1,1‐difluoroethylation of diaryliodonium salts under mild conditions, affording (1,1‐difluoroethyl)arenes in good to excellent yields. This convenient procedure tolerates a wide range of functional groups